Chapter 1: Meet the Penguin

Chapter Introduction

This chapter is for a grown-up to read aloud with a child. Take your time. If it is winter where you live, you can look outside together at the cold weather.

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The world is white with snow.

Soft snow falls from a gray sky.

A penguin walks across the ice.

The penguin moves slowly — left, right, left, right.

The penguin stops.

The penguin looks at you.

The penguin nods.

Hi.

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Lesson 1: Hi. I Am the Penguin.

Learning Goals (for the grown-up to know)

By the end of this lesson, the child will:

• Know the Penguin is one of nine Coaches
• Know the Penguin teaches about cold
• Know what cold feels like
• Know that bodies respond to cold (goosebumps, shivering)
• Know that every body handles cold in its own way

Key Words

• Penguin — the Coach who teaches about cold.
• Cold — when the air or water is colder than your body.
• Goosebumps — the tiny bumps on your skin when you get cold.
• Shiver — when your body shakes a little to make warmth.
• Warm — when your body feels cozy and just right.

The Penguin's Story

Hi. I am the Penguin.

I am a Coach.

You have met the Bear, the Turtle, the Cat, and the Lion.

I teach about cold.

I live in cold.

Penguins love cold weather. Our bodies are built for it.

We have soft feathers everywhere — even on our feet.

We have a thick layer under our skin that keeps us warm.

We huddle together in big groups when it is very cold.

Cold is home for me.

What Cold Feels Like

When you go outside in winter, you might feel cold.

Cold can feel like:

• Cold cheeks
• Cold fingers and toes
• A little tingle on your skin
• A pull-in feeling — like you want to hug yourself
• Your breath in a little white cloud when you breathe out

Cold is just the world being colder than your body. Your body is warm inside. When the air is colder than you, that is cold.

The Penguin loves cold. But the Penguin knows most humans like warm better. That is okay. Humans are not built for very cold like penguins are. Humans need clothes and warm houses.

Your Body Responds to Cold

When your body gets cold, it does some interesting things.

Goosebumps. Tiny bumps appear on your skin. Long ago, when humans had more body hair, the hairs would stand up to trap warm air. We still get the goosebumps today. They are a little reminder from your body — "I am cold."

Shivering. Sometimes when you are really cold, your body shakes a little. That is shivering. Shivering makes your muscles work fast, and that makes warmth. Your body is making heat to warm itself up.

Cold hands and feet first. Your fingers and toes usually get cold first. Your body keeps the most warmth around your important parts — your heart, your tummy, your head. Your hands and feet are farthest from the middle, so they cool down first.

Wanting to move. Your body might want to jump or run when it gets cold. Moving makes warmth. The Lion and the Penguin work together on this.

The Penguin has watched human bodies in cold for a long, long time. Your body knows what to do.

Every Body Handles Cold Differently

Some kids get cold easily.

Some kids do not get cold easily.

Some kids love cold weather.

Some kids do not love cold weather.

Some kids live where it is cold most of the year.

Some kids live where it is never very cold.

Some kids have a hard time keeping their hands warm.

Some kids have warm hands almost always.

All of these are normal.

Bodies are different from each other.

Your body's way of handling cold is the right way for you.

If your hands get really cold, you can put on mittens.

If your feet get cold, you can wear thick socks.

If your nose gets cold, you can pull up a scarf.

You take care of your body.

The Penguin sees you.

Lesson Check (for grown-up and child to talk about)

1. Who is the Penguin?
2. What does the Penguin teach about?
3. Can you name two things your body does when it is cold?
4. Why do hands and feet usually get cold first?

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Lesson 2: Being Cozy in Cold

Learning Goals

By the end of this lesson, the child will:

• Know what to wear in cold weather
• Know that going inside warms you up
• Know the cold-water rule (kids and water = trusted grown-up)
• Know not to play on ice
• Know to tell a trusted grown-up if a part of them is really cold

Key Words

• Cozy — warm and comfortable.
• Layer — a piece of clothing you wear on top of other clothes.
• Mitten — a soft glove that keeps your hand warm.
• Inside — anywhere inside a warm building.
• Ice — frozen water that is hard and slippery.

Getting Cozy in Cold

When the world is cold, your trusted grown-ups help you stay cozy.

Here are some of the things that help:

Clothes in layers.

A T-shirt under a sweater under a coat works better than one really thick thing. The layers trap warm air close to your body.

A warm hat.

Lots of warmth leaves through the top of your head. A warm hat keeps it in.

Mittens or gloves.

Your hands get cold first. Mittens keep the fingers together and warm. Some kids like gloves better. Both work.

Warm socks and boots.

Your feet need warmth too. Thick socks. Waterproof boots if it is wet.

A scarf.

A scarf wraps around your neck and chin. Sometimes you can pull it up over your nose if your face gets cold.

Going inside when you are too cold.

This is the most important one. When your body has had enough cold, go inside. Inside is warm. Your body needs warm time too.

Hot Drinks and Warm Foods

Inside, you can have warm things.

A bowl of soup.

A warm drink — like warm milk or hot chocolate or warm cider.

A blanket around your shoulders.

A hug from someone you love.

All of these help warm a cold body.

The Bear has more to say about warm foods in winter. The Penguin just wants you to know — warm food and warm drinks help in cold weather.

Cold and Water — An Important Rule

The Penguin needs to teach you one very important rule.

Kids and water are always with a trusted grown-up.

This rule is true any time of year. But the Penguin wants to say it now, because cold and water together can be extra serious.

The rule:

• Kids and pools — trusted grown-up close, watching.
• Kids and lakes — trusted grown-up close, watching.
• Kids and oceans — trusted grown-up close, watching.
• Kids and rivers — trusted grown-up close, watching.
• Kids and big puddles or streams in spring — trusted grown-up close, watching.
• Kids and bathtubs at home — trusted grown-up close.

The Penguin will say this many more times across the years. Trusted grown-ups close to water. Always.

When water is cold, falling in is extra serious. Even on a warm day, cold water can shock your body. Trusted grown-ups know what to do. They keep you safe.

The Elephant will teach you more about water when you meet them. The Elephant and the Penguin agree completely on this rule.

Ice — Do Not Play On It

When water freezes, it becomes ice.

You see ice in winter — frozen ponds, frozen lakes, frozen puddles, frozen rivers.

Kids do not play on frozen ponds, lakes, or rivers. Ever.

Even when ice looks hard. Even when grown-ups walked on it last year. Even when other kids are out there.

Ice can break. People can fall into the cold water under it. That is very dangerous.

If your family goes ice-skating, you go to a special ice-skating rink, with grown-ups, with skates, with rules. A skating rink is different from a frozen pond. Skating rinks are made and checked by people whose job is to keep ice safe.

A frozen pond in nature is not safe to walk on.

The Penguin lives on ice. The Penguin knows ice. The Penguin says: kids stay off natural ice.

When Something Is Really Cold

If a part of you is really cold — like fingers or toes you cannot feel — tell a trusted grown-up right away.

If your skin turns very pale or very red or feels numb (like you cannot feel a touch on it) — tell a trusted grown-up right away.

If you are shivering so much you cannot stop — tell a trusted grown-up right away.

Your grown-up will help you. They will:

• Get you inside.
• Help you warm up slowly with blankets and warm clothes.
• Give you something warm to drink.
• Watch you to make sure you feel better.

You are not in trouble for getting too cold. Bodies sometimes get too cold. Your grown-ups know how to help.

Lesson Check

1. Name three things that help you stay cozy in cold weather.
2. What is the rule about kids and water?
3. Can you play on a frozen pond?
4. What do you do if a part of you is really cold?

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End-of-Chapter Activity: A Cozy Plan

The Penguin has a small activity for you and your trusted grown-up.

Together, make a cozy plan for cold weather.

Look at your winter clothes together. What do you have?

• A warm coat?
• A hat?
• Mittens or gloves?
• A scarf?
• Warm socks?
• Boots?
• Snow pants (if you have lots of snow)?

If anything is missing or too small, your grown-up will know what to do.

Then talk about your favorite cozy indoor things:

• A favorite warm drink?
• A favorite soup?
• A favorite blanket?
• A favorite cozy book to read on a cold day?

Make a small list. You can hang it up somewhere.

When the weather gets cold, you and your grown-up have a plan.

The Penguin is proud of you.

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Vocabulary Review

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Chapter Review (for grown-up and child to talk about)

1. Who is the Penguin, and what does the Penguin teach?
2. What is one thing your body does when it gets cold?
3. Name three things that help you stay cozy in cold weather.
4. What is the rule about kids and water?
5. Can you play on a frozen pond?

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Instructor's Guide

Important: this Instructor's Guide carries load-bearing parent-education work — pediatric cold-weather safety, frostbite and hypothermia awareness (parent-only at K), cold-water safety guidance, the K-12 cold-plunge protocol-firewall at parent-only level, and pre-conversation guidance.

Pacing recommendations

This K Cold chapter is the FIFTH chapter of the K cycle and opens the K environmental-coach arc. Two lessons. Spans four to six read-aloud sessions of ~10-20 minutes each. The chapter works especially well during cold-weather seasons — kids can connect what they read to what they experience.

• Lesson 1 (Hi. I Am the Penguin.): two to three read-aloud sessions. Introduces the Penguin. What cold feels like. Body responses (goosebumps, shivering). "Every body handles cold in its own way."
• Lesson 2 (Being Cozy in Cold): two to three read-aloud sessions. Layers and winter clothes. Hot drinks and warm foods inside. The cold-water-and-grown-up rule is load-bearing safety material at K register — give it real time. Ice safety. Tell a grown-up if really cold.

Approach to reading

This chapter is meant to be read aloud by a trusted grown-up to the child. If it is winter where you live, read this chapter and then walk to a window and look outside together. If your kid is well-bundled, you might read part of the chapter outside.

Lesson check answers (for grown-up reference)

Lesson 1

1. The Penguin is the Coach who teaches about cold.
2. Cold.
3. Open-ended. Sample two: goosebumps, shivering, cold hands and feet first, wanting to move.
4. Because the body keeps warmth around its most important parts (heart, tummy, head) and hands and feet are farthest from the middle.

Lesson 2

1. Open-ended. Sample three: warm coat, hat, mittens, scarf, warm socks, boots, going inside, warm drinks, warm food.
2. Kids and water are always with a trusted grown-up. Always.
3. No. Kids do not play on natural frozen ponds, lakes, or rivers. Skating rinks (where ice is made and checked) are different.
4. Tell a trusted grown-up right away.

Chapter review answer key

1. The Penguin teaches about cold.
2. Open-ended. Sample: goosebumps, shivering, cold hands/feet, wanting to move.
3. Sample three: layers, warm hat, mittens, warm socks, boots, scarf, going inside, warm drinks.
4. Kids and water = trusted grown-up close, always.
5. No. Natural ice is not safe to play on. Skating rinks are different.

Pre-Chapter Conversation for Parents

Before reading the chapter together:

• The Penguin. "We are meeting the Penguin today. The Penguin is the Coach who teaches about cold. Penguins live in very cold places — like Antarctica. Their bodies are built for cold."
• What cold feels like. "When was the last time you felt cold? What did it feel like?"
• Cold-weather clothes. Take a moment together to look at your child's winter clothes. Point out the layers system. If anything is missing or too small, plan to address it.
• Water safety. Briefly remind your child of the always-with-a-grown-up rule around water. This rule will be reinforced when the Elephant chapter comes later.

Pediatric Cold-Weather Safety (Parent Reference)

The American Academy of Pediatrics provides cold-weather safety guidance for kids [1, 2]:

Dress for the weather:

• Layers: a base layer (long underwear or T-shirt), middle layer (sweater), outer layer (coat or snowsuit)
• Hat covering ears
• Mittens (warmer than gloves for K kids)
• Warm socks (wool or synthetic, not cotton if wet)
• Waterproof boots if snow or slush
• Scarf or face covering for face
• For babies / very young kids, an extra layer beyond what an adult would wear

Time outside:

• Most K kids can play outside in cold weather for 20-30 minutes at a time before needing a warm-up
• Below 0°F (-18°C) or in dangerous wind chill, keep kids inside
• Listen to local school and family decisions about outdoor recess in cold

Watch for:

• Frostbite signs: skin turns pale, gray, or waxy; numbness; cold to touch
• Hypothermia signs: shivering very hard, then shivering stops despite still being cold; confusion; slurred speech; very tired; wanting to lie down
• Either is a medical emergency. Get the child inside, warm slowly, call your pediatrician or 911 for serious cases.

(Note: at K, the kid does not learn the words frostbite or hypothermia. These belong to the parent vocabulary. The kid learns "tell a grown-up if a part of you is really cold." Parents handle the medical response.)

Cold-Water Safety (Parent Guidance — Load-Bearing)

Drowning is a leading cause of unintentional injury death for young children in the US [3]. Cold water is extra dangerous because cold-water shock can cause involuntary gasping and loss of swimming ability within seconds [4].

For K kids:

• Always close, always watching when kids are near any water — pool, lake, river, ocean, bathtub
• Never on phone or chatting with another adult facing away
• Never play on natural ice (frozen ponds, lakes, rivers) — ice can break
• If a child falls in cold water: get them out as fast as safely possible; bring inside; remove wet clothes; warm slowly; call pediatrician or 911 for serious cases
• Bathtub: never leave a K-aged child alone in the bath, even for a moment

Swimming lessons starting at age 4+ are recommended by the AAP. Lessons do not replace adult supervision but do reduce drowning risk.

Crisis Resources (parent-only at K — NOT introduced to kid)

At K, kids do not call 911 themselves. The chapter does not introduce these numbers. Parents should know:

• 911 for medical emergencies, including hypothermia, severe frostbite, near-drowning, breathing emergencies
• 988 Suicide & Crisis Lifeline — call or text 988 (operational and verified May 2026)
• Crisis Text Line — text HOME to 741741
• SAMHSA National Helpline — 1-800-662-4357
• National Alliance for Eating Disorders — (866) 662-1235

The older NEDA helpline number 1-800-931-2237 is NO LONGER WORKING. Use the National Alliance for Eating Disorders number above instead.

What Parents Should Know About Adult-Marketed Cold Practices

You may encounter adult-marketed wellness practices around cold — cold-plunges, ice baths, cold-water immersion routines, the Wim Hof Method, and similar. None of these practices are appropriate for K kids. Pediatric organizations do not endorse deliberate cold-exposure protocols for children. Kids' thermoregulatory systems are still developing; the risks (cold-water shock, hypothermia, drowning) outweigh any possible benefit at K age.

At Kindergarten, this firewall is held only at the parent level — your child does not need to know about adult-marketed cold practices yet. If anyone in your family practices cold-plunges or similar as adults, that is your choice as an adult. The Library teaches your child the general healthy framework (bundle up, warm food and drinks inside, never on natural ice, kids-and-water-with-grown-ups) without prescribing or naming any specific adult-marketed protocol. When your child is older (Grade 5), the Library will introduce the framework that distinguishes adult choices from age-appropriate kid practice.

What This Chapter Does Not Teach (Full List for Parent Reference)

• The words frostbite or hypothermia in kid-facing body (parent-only at K; G5 introduces as vocabulary)
• Thermoregulation technical vocabulary (vasoconstriction, brown fat, etc. — G6+ territory)
• The G4 two-jobs framework (heat-making / heat-keeping) — G4 territory
• The G5 three-timescales framework — G5 territory
• The SHIVERING-STOPS critical signal — G4 territory
• Temperature math (Fahrenheit/Celsius, wind chill formulas)
• Cold-plunge, ice-bath, or cold-immersion protocols (parent-only awareness at K)
• 911 / 988 / crisis resources in kid-facing body (parent-only at K)
• Detailed drowning physiology
• Pandemic-era topics
• Branded protocols or contemporary popularizers

Discussion Prompts (for grown-up + kid conversation)

1. What is your favorite thing about cold weather?
2. What is your least favorite thing about cold weather?
3. Where do penguins live? Why do you think their bodies are built for cold?
4. What is your favorite warm drink?
5. Have you ever seen ice on a pond or lake? What did it look like?
6. Have you ever gotten really cold? What helped you warm up?

Common Kid Questions

1. "Can I touch a penguin?" — Most kids will not meet a real penguin in person. Penguins live in cold places far from where most people live. Some zoos and aquariums have penguins, but you do not touch them — you look from a safe distance. Penguins are wild animals.

2. "Why is the Penguin not scared of cold?" — Penguins are built for cold. They have thick feathers, a layer of fat, and bodies designed for ice and cold water. Humans are not built like that. We need clothes and warm houses.

3. "What if I love cold weather?" — That is great. Some kids and grown-ups really love cold. Cold weather is wonderful when you are dressed for it. The Penguin loves cold too.

4. "What if I hate cold weather?" — Also totally fine. Many people prefer warm weather. The Camel — the Coach you will meet next — lives in warm places. Different people like different weather.

5. "What if I fall through ice?" — Tell a grown-up immediately. Yell. Try not to panic. The Library teaches you to stay off natural ice in the first place so this does not happen. Trusted grown-ups will help if it ever does.

6. "Why does my mom take off my wet clothes when I come inside?" — Wet clothes in cold weather are a problem. They lose their warmth. Dry clothes warm you up much faster. Your mom knows this. (At G4, the Library will teach more about why wet + cold is the most dangerous mix. At K, you just trust your grown-ups.)

7. "Can I have hot chocolate every cold day?" — Hot chocolate is wonderful sometimes. Your family decides how often. Some families have hot chocolate often in winter; some save it for special occasions. Both are fine. The warm drink is what matters most.

Family Activity Suggestions

• Winter clothes inventory. Go through your child's cold-weather clothes together. Make sure each layer fits. Replace what is too small.
• A cozy reading nook. Set up a special winter reading spot with blankets and pillows. Make it a place to retreat when it is cold outside.
• Hot drink night. Once a week in winter, have hot drinks together — hot chocolate, warm milk with cinnamon, herbal tea (cool enough for kids).
• Outdoor winter adventure. Once a week, weather permitting, bundle up and go outside together — even just 15 minutes. Build something with snow, look for animal tracks, watch your breath in the cold air.
• Penguin documentary. Watch a short kid-friendly nature documentary about penguins. Many K kids are fascinated by penguin life.

Founder Review Notes — Safety-Critical Content Protocol

This chapter is flagged founder_review_required: true because it covers safety-critical content categories appropriate for the Kindergarten age:

• Age-appropriate health messaging. Picture-book pacing. No technical thermoregulation vocabulary. No clinical frostbite/hypothermia labels in kid-facing body (parent-only).
• Cold-water safety (light-touch at K). The kids-and-water-with-grown-ups rule is reinforced at K register. Natural-ice safety rule introduced. Cold-water-shock awareness handled at parent level only.
• Body image vigilance. "Every body handles cold in its own way" body-positive framing on cold-handling diversity.
• Ability inclusion. Diverse winter scenes show kids with adaptive equipment (wheelchairs with snow tires, hand-warmer accommodations, varied layering).
• Crisis resources (parent-only at K). Numbers in Instructor's Guide for parent use. NEDA non-functional flag preserved.
• Parent education (load-bearing). This Guide handles pediatric cold-weather safety, frostbite and hypothermia awareness, cold-water safety guidance, K-12 cold-plunge firewall at parent-only level.

Cycle Position Notes

FIFTH chapter of the K cycle. OPENS the K environmental-coaches arc (Cold, Hot, Breath, Light, Water). The body-mind-rest-movement core (Bear-Turtle-Cat-Lion) is now complete; the environmental coaches layer climate, breath, light, and water context. The Penguin-Camel climate-twin partnership at K is implicit (the Camel will be introduced next as the Coach who lives in warm places, in contrast to the Penguin who lives in cold) — at K the twin-pair architecture from G4/G5 is held LIGHTLY as character contrast, not as the load-bearing structural-twin construction it becomes at G4/G5. The K cycle continues with Hot (Camel), Breath (Dolphin), Light (Rooster), and closes with Water (Elephant).

Parent Communication Template (send home before reading)

Dear families,

This week our classroom is meeting the Penguin — the fifth Coach in our Library, and the first of our environmental coaches (the Coaches who teach about the world around us — cold, hot, breath, light, water). The chapter is called Meet the Penguin.

The Penguin introduces cold at the simplest age-appropriate level: cold feels chilly, bodies respond with goosebumps and shivering, every body handles cold in its own way, layers and warm clothes and inside time help, and trusted grown-ups close around any water — especially cold water.

The chapter teaches the cold-water-and-grown-up rule (kids and water = trusted grown-up close, always) and the natural-ice rule (kids do not play on frozen ponds, lakes, or rivers). These are important safety teachings at K.

The chapter does NOT teach the words frostbite or hypothermia — those are parent-vocabulary at K. The kid learns "tell a trusted grown-up if a part of you is really cold."

At home, you can:

• Read the chapter (especially during cold weather)
• Go through your child's winter clothes together
• Talk about your family's cold-weather routines
• Reinforce the cold-water and ice rules before any winter outings near frozen water

Pediatric guidance for cold-weather safety, frostbite/hypothermia signs, and cold-water safety is in the full Instructor's Guide.

Thank you for reading the Library with your child.

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Illustration Briefs

Chapter Introduction

• Penguin on the ice. Peaceful winter scene with soft snow, gray-blue sky, friendly emperor penguin standing on snowy ice. Plump and warm-looking, kind eyes, small smile. A child in winter clothes stands at the edge of the scene watching with curiosity. Mood: cold but cozy.

Lesson 1

• Penguin huddle. A group of penguins huddled together on the ice, one sleeping peacefully in the middle. Soft snowfall. Polar sea in background. Caption: "Penguins love cold."
• Stepping outside in winter. A child stepping outside on a winter day in coat and hat. Small visible breath cloud. Slightly pink cheeks. Mittens. The Penguin watching warmly from the doorway. Caption: "Cold is the world being colder than your body."
• Body responses to cold (diagram). A friendly diagram of a child outside in winter clothes with small arrows pointing to: goosebumps on arm, shivering through body, cold blue-tinted hands/feet, warm-glow middle, running pose. The Penguin beside the child. Caption: "Your body knows what to do in cold."
• Diverse cold-handling. A diverse group of kids outside in winter — one bundled, one in lighter winter clothes, one in a wheelchair with snow tires, one with hand warmers, one with extra layers. All content. The Penguin in the background. Caption: "Every body handles cold in its own way."

Lesson 2

• Bundling up. A child fully bundled up with each item labeled — coat, hat, mittens, scarf, snow pants, waterproof boots. A trusted grown-up helping zip up. The Penguin nearby, proud. Caption: "Layers, hat, mittens, warm boots. Then outside!"
• Cozy indoors. A child wrapped in a blanket on a couch holding a warm mug. A trusted grown-up beside them. Snow outside the window. The Penguin peeking through the window. Caption: "Inside, warm things help."
• Water safety with a grown-up. A child on a dock or beach edge with a trusted grown-up, both looking at the water. Lifeguard chair visible. The Penguin on a nearby rock or post, watchful. Caption: "Kids and water = trusted grown-up close. Always."
• Ice safety / no on frozen pond. A clear "DO NOT GO ON ICE" sign by a frozen pond. A trusted grown-up gently holding a kid's hand, walking past on the safe path. The Penguin in the snow nearby, firm and serious. Caption: "Kids stay off natural ice. Always."
• Getting really cold response. A child on a couch wrapped in a blanket, looking chilled. A trusted grown-up bringing a warm mug. Another grown-up rubbing the child's hands gently. The Penguin nearby. Caption: "If you are really cold, tell a trusted grown-up."

Activity / Closing

• Cozy plan. A child and parent at a table together with winter clothes laid out and a small drawn/written cozy plan. Both smiling. The Penguin watching warmly. Caption: "Make your cozy plan together."

Aspect ratios: 16:9 digital, 4:3 print. Diverse skin tones, body sizes, hair textures, gender expressions, abilities (winter-adaptive wheelchairs with snow tires, walkers, mobility aids, hand warmers, varied layer counts), and family compositions throughout the chapter. The Penguin's character design carries forward to G1, G2 and matches G3-G5.

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Citations

1. American Academy of Pediatrics. (2018). Winter Safety Tips for Children. AAP Healthy Children. https://www.healthychildren.org/English/safety-prevention/at-play/Pages/Winter-Safety-Tips.aspx
2. American Academy of Pediatrics Council on Sports Medicine and Fitness. (2011). Climatic heat stress and exercising children and adolescents (companion guidance addresses cold weather and exercise for children). Pediatrics, 128(3), e741-e747. https://doi.org/10.1542/peds.2011-1664
3. Centers for Disease Control and Prevention. (2024). Drowning Prevention: Drowning Facts. National Center for Injury Prevention and Control. https://www.cdc.gov/drowning/data-research/facts/
4. Tipton MJ, Collier N, Massey H, Corbett J, Harper M. (2017). Cold water immersion: kill or cure? Experimental Physiology, 102(11), 1335-1355. https://doi.org/10.1113/EP086283
5. McIntosh SE, Freer L, Grissom CK, et al. (2019). Wilderness Medical Society clinical practice guidelines for the prevention and treatment of frostbite: 2019 update. Wilderness & Environmental Medicine, 30(4S), S19-S32. https://doi.org/10.1016/j.wem.2019.05.002
6. Brown DJA, Brugger H, Boyd J, Paal P. (2012). Accidental hypothermia. New England Journal of Medicine, 367(20), 1930-1938. https://doi.org/10.1056/NEJMra1114208
7. American Academy of Pediatrics, Committee on Injury, Violence, and Poison Prevention. (2019). Prevention of Drowning. Pediatrics, 143(5), e20190850. https://doi.org/10.1542/peds.2019-0850